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Finding the Fourth Proportional to 643,874.49, 888,587.10 and 357,399.36

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Solution

The fourth proportional to 643,874.49, 888,587.10 and 357,399.36 is: 493,233.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,874.49 : 888,587.10 = 357,399.36 : x
  2. Step 2: Convert to fraction form
    643,874.49/888,587.10 = 357,399.36/x
  3. Step 3: Cross multiply
    643,874.49x = 888,587.10 × 357,399.36
  4. Step 4: Simplify right side
    643,874.49x = 317,580,460,844.26
  5. Step 5: Solve for x
    x = 317,580,460,844.26/643,874.49
  6. Step 6: Final answer
    x = 493,233.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.